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3. Collar, N. J., and C. Robson (2007). Family Timaliidae (babblers). In Handbook of the Birds of the World. Volume 12 (J. del Hoyo, A. Elliott, and D. A. Christie, Editors). Lynx Edicions, Barcelona, Spain. pp. 70–291.
4. Humphrey, P. S., and K. C. Parkes (1959). An approach to the study of molts and plumages. Auk 76(1):1–31.